1984 NISSAN 300ZX Electrical System Workshop Manual

METER AND GAUGES - Digital Type Combination Meter
combination Meter
CAUTION:
No electrical terminal should be touched wlth bare hands.
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METER AND GAUGES - Digital Type Combination Meter
Combination Meter (Cont'd)
--
Power ""lt
To power unit
12 13 14 15 24 30 16 17 18 19 20 21 22 6 21 28
40
45 55 46 47 48 49 50 51 53 54
;I4 E
i
SE L661 D
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FUEL TANK GAUGE (Main1
'I
SI
01
74
I -0 I
A FUSE
__Izt___l

METER AND GAUGES - Digital Type Combination Meter
Wiring Diagram
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METER AND GAUGES - Digital Type Combination Meter
Wiring Diagram (Cont'd)
GY LIR
tiT POWER
TACH0 & TORDUE METER
SPEED METER
SEL663D
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METER AND GAUGES - Digital Type Combination Meter
Display Check
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METER AND GAUGES - Digital Type Combination Meter
-
(+) (-) OFF
Display Check (Cont'd)
a Digital combination meter is provided with a
self-check function to determine whether or
not meter itself
is malfunctioning.
Test procedure
(1) While pushing trip reset switch A, switch igni-
tion switch from
"OFF" to "ON" Trip reset
switch
A should remain pushed in until self-
check operation start
(2) Meter starts to automatically perform self-
check. Segments for meters and gauges should
illuminate one after another.
(3) If any particular segment remains off, corn-
bination meter
itself is faulty.
ACC ON -Preparation for Trouble-shooting -
0

Approx
12v 0 ov ov
SEL665D
a
Remove instrument switch
a Remove cluster lid A
Remove nut which holds instrument switch
- Trouble-shooting
I Go to "Display check" I
1 NG
power source circuit unit
-IF' L-IF-NG
Replace meter and
gauge assembly
Check for loose
harness connector
Voltmeter terminals Ignition switch position
Ohmmeter terminals
Ignition Switch OFF
Continuity exists ground
a Disconnect meter harness connector as shown
below
.
SEL744D
-
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METER AND GAUGES - Digital Type Combination Meter
Trouble-shooting (Cont'd)
Replace meter
and gauge assembly
Speedometer does not operate
Go to "Display Check"
Check harness between
speed sensor and meter
OK
Go to "Power
Unit Check"
T T Replace meter Replace
and gauge assembly power Unit
Go to "Speed Sensor Signal Check" to check speed
sensor output
Go to "Display Check"
Go to "Power
Unit Check"
OK
Replace meter Replace
and gauge assembly power unit
.
1 Check ignition coil circuit I
and gauge assen
1'
T lNG Replace meter Check resistor, ignition
and
gauge assembly coil and power transistor
(Refer to ignition system)
1 Disconnect meter harness connector
2
3 Check terminal voltage between @ and
(white)
Turn ignition switch to
"ON".
0
VOltmeter SEL6660
EL-48